<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Demo</title>
<style>
html,body{
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
  font-family: Helvetica;
  background-color: #fff;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
#root{
  position: relative;
}
.demo{
  width: 800px;
  margin: 20px auto 0 auto;
  border: 1px solid #ccc;
  border-radius: 2px;
}
.preview-button,
.modal-button{
  width: auto;
  padding: 0 10px !important;
  font-size: 14px !important;
}
.keyboard-item{
  box-sizing: border-box;
  position: relative;
  top: -2px;
  padding: 2px 6px;
  background-color: #fff;
  border: 1px solid #ddd;
  border-radius: 2px;
  background-image: linear-gradient(#fff, #f8f8f8);
  box-shadow: 0 1px 0 rgba(0,0,0,.1);
  color: #666;
  font-size: 12px;
}
</style>
</head>
<body>
<div id="root"></div>
</body>
</html>